blocked level

例句：

1. 1. The engineer found that theblockage in the pipeline was causing asignificant drop in pressure.
   工程师发现管道中的堵塞导致了压力的显著下降。
2. 2. The construction crewhad to clear the blockage before theycould continue work.
   施工队伍在继续工作之前必须清除堵塞。
3. 3. The research team identified severalpotential sources of blockage in the system.
   研究团队确定了系统内几个潜在的堵塞源。